function MyRandom(){ 
	var imga = '';
	var imgnum = '';
	imgnum = Math.floor(Math.random() * 4) + 1;
	if (imgnum <=2)
	{
		imga = '<a href=\'http://www.iflytek.com/Html/cpfw/yypt/hccp/111934242.html\' target=_blank><img src="/images/images/banner_img2.jpg" width="312" height="199" border=\'0\'/></a>';
	}
	else
	{
		if (imgnum == 3)
		{
			imga = '<a href=\'http://www.iflytek.com/Html/ywkd/xfdt/131033634.html\' target=_blank><img src="/images/images/banner_img1.jpg" width="312" height="199" border=\'0\'/></a>';
		}
		else
		{
			imga = '<a href=\'http://www.iflytek.com/Html/ywkd/xfdt/144403777.html\' target=_blank><img src="/images/images/banner_img3.jpg" width="312" height="199" border=\'0\'/></a>';
		}
	}
	//return imga;
	document.write("<a href=\'http://www.iflytek.com/Html/ywkd/xfdt/144403777.html\' target=_blank>");
	document.write(imga);
	document.write("</a>");
}